Lifting device



J. C. JONES.

LIFTING DEVICE.

APPLICATION FILED JAN. 26. 1920.

Patented Mar. 28, 1922.

JOHN c. JONE$, or snoorrmnn, MASSACHUSETTS.

-, LIFTING DEVICE.

il,et10,924,

Specification of Letters latent.

Patented Mar. 28, 19223.

application filed ianuary 26,1920. SeriaLNo. 354,05a

To all whomit may camel 2,. i 7

Be it knownthat 1. JOHN G. Jones, of Brookline, in the county of Norfolk and State of Massachusetts, have invented a new and useful Lifting Device, of whichthe fol-- lowing is a specification.

The principal object of my invention is to provide a lifting device, which is especially adapted for usewith automobiles, and which has power and quickness of action but which is cheap to manufacture.

A feature of my invention is an actuator to engage the end of the lifting member. v

Another feature is an oscillatory actuator having a specially formed actuating periphery.

Another feature is an actuator having a continuous movementin one direction to accomplish the entire lifting. 3

Another feature is the automatic lowering of thelifting member.

Another feature is the holding member acting independently of the actuator;

Another. feature is that all the principal elements, which are few in number, may be of cast metal; Otherffeatures will be pointed out below.

In the drawing a Figure 1 is a front elevation of my lifting device; a Y Figure 2 is a side elevation thereof; and Figure 3 is a fragmentary section of the holding member. s

The cast metal supporting frame has an enlarged fiat base. portion A with integral reenforcing parts a a'and a? connected integrally with wall A and similar integral rcenforcing parts such as as and a? i rallv connected with wall A These walls-A and havean integral reenforcing band a con necting them at the, front and rear and also an integral connecting portion a. ;The walls A" and A are perforatedto receive the shaft B whichis integral with hub 13, the latterhaving two passagesb and 6 extending therethrough and. being at a right angle to each otherand adapted to receive the removable turning member B 1 It will be understood that any desired number'of openings in the hub B may be provided to receive the turning member, which may be ofany suitable length. l

a The actuating member D is preferably of cast metal and has a perforation for the shaft .13 and has a fixed connection with said by means of a split rivet 0Z although any other suitable device could be used. The fiat periphery of the actuating member is shaped as shown and the purpose. of said shaping will bedescribedbelow. l

The lifting member E is preferably a sin- I gle castingcomprising teeth 6 and a curved seat which is located centrally of the device and is well adapted to engage an axle of an automobile. The whole space however between the prongs e and e is availableas a seat. Integral with member E, I' provide another seat E which may be conveniently usedto engage a member which is lower than the member to be engagedby seat 6'.

7 Roller E is pivotally mounted at the end of member E forming an operative part thereof. e a i Pivoted to the frame as by rivet f is holdmg dog'F which is preferably of cast metal and which hasa prong f to, engage the desired tooth e and which has an integral ex tension f of substantial weight so as normally to hold, the end of prong f in the path of teethe.

l l hen the device is to be operated the mom berlB 'is inserted in the desired opening and the member I) is turned in the direction of the arrow. the portion (7 increasing rapidly in its distancefromlthe axis so as togive great lifting power at the start of thehlift. The increase from thepoint (Z to the end d is moregradual andit will be understood that this portion may be extended beyond When said prong s in its 7 nor1nal,.pos1t1on its underv side bears on (Z? by making member D larger if it is desired to give more travel to the lifting member. As the latter is raised theprong f will ride alongothe teeth ve and when the lifting member has been raised to the desire'd point the portion 7? will swing prong 7 in wardly so that it engages the flat portion of the adjacent .tooth and firmly holds the lifting member in its raised. positioni jamming the member E against the ad] ace nt portions "of the frame. When "the lifting member is to be loweredthe member will be turned slightly in the :direction of the arrow whereupon the. prong f may be swung out of the path of the teeth@ isoas to permit lowering of member E. This lowering is automatic, that is to say, the weight of the automobile or other lifted thing will compel rotation of member the direction opposite to that indicated by the arrow and member E'willmove slowly down to its lowest position, this automatic closing being preferably accomplished by the disclosedshape of the "periphery of .member D. -While the friction of the parts would undoubtedly be su'ificient to ensure slow lowering of'memb'er Eyet if desired the spring G may be used. Of course the lowering :may be controlled by member 13 or even by a slightgrip-of the hand on hub B. "It will be observed that "member B may be applied in different openings of the hub as may be convenient in view of the parneuiar 'retative position which said hub may occupy at any given'tinie.

*It will also be observed that the member B may be operated entirelyby the foot because the pressure to be applied nlay/be downward 'on said member both for raising member E'i-n'its general upward movement and for the slight raising to permit unlock- .ing'ofthe prong f.

An important advantage of my device is that I provide an actuator having continu- 7 even if'it should it may be oils-rotary motion in one direction to move the lifting member through its entire travel and to .give great power and at the'isame time a long lifting distance. f

, Another important advantage is that my device will not easily get out of order and entirely and easily disassembled by removing the two rivets.

' Another advantage is that the hub may be turned by hand until the lifting member engages the member to be lifted and j'then the turning member may be inserted so that the member may do all the actual lifting without being removed from the hub.

.What I claim is:

device ofY he character described comprising "a lifting member; a pivoted actuating member having a periphery t0 the end of .s'aidliftin'g member'and thereby raise the lifting member, that portron the periphery which engages the lifting member during the first portion of the raising increasing rapidly in its distance fro ii fsaid pivot and the remainder of said periphery increasing more gradually in its distance from said pivot. r

2.,A device of the character described eompr 's ng a supporting frame a lifting 'lmounited to move longitudinally within said frame; a holding member hub an oscillatingactuator directly "D in lowered position,-

said frame and being provided with a fixed engaging said lifting member and fixed to said shaft and mounted to swing within said frame and preventing undesired axial movementof said shaft, the axis of said actuator being in line with said lifting member, and a brake spring for the shaft arranged between the frame and hub.

3. A device of the character described comprising a lifting member movable longitudinally; a shaft having a'fixed axis, which is in line with said lifting member; an oscillatory member fixed to said shaft and having a periphery to directly engagethe end of said lifting member, said periphery continuously increasing in its distancefrom the axis of the oscillatory member throughout the lifting movement, theoscillatory member having another peripheral part provided with a plurality of peripheral engaging portions, and a removable handle adapted for engagement with any one of said portions to operate the oscillatory member. z

LA "device of the character described comprising a lifting member movable longitudinally a shaft havinga 'fiizedax'is, "which is in line with said lifting member; at oscillatory memb er fixed to said "shaft and having a periphery to directly engage the end of said. lifting member,fsaid peripher continuously increasing in its 'distance'from the axis of the oscillatory member throughout the lifting movement, the oscillatory member having another peripheral part provided with a plurality of j-peri'pherzil engaging portions; a removable handle adapted for engagement with any one of said portions 'to operate the "oscillatory member, and means independent of the oscillatory member to hold the lifting member in the desired position. p

5. A lifting jack including a frame. "a longitudinally movable lifting member slidably mounted in the frame,'and an oscillating cam mounted in'th'e frame and having its axis in alignment with the plane of movement of the "lifting member, said mm having an operative surface engaging said lifting member, and the radius of {said surface from said axis rapidly inereasirrg in ing length from this fpoi'nt to the trailing portion "of said serrate," i 6. A ack asdefined inclaim 5 provided withmeans for holding manning member in adjusted positions independently as saidcam.

p 7. A jackas definedby claim 5 in which the cam is provided withn abutment surface, which when the lifting member is in projects entwa'rdly from the frame and is adapted to be engaged by the operators foot to permit initial operation of the cam without manual operation.

8. A jack as defined by claim in which the cam has its central portion removed to reduce weight and to permit the insertion of the operators foot for initially actuating the cam by pressing downwardly with the foot. 9. A jack of the kind described including a movable lifting member, a frame member supporting the same, an actuator for the lifting member, one of said members being provided with a series of teeth, a pivotally mounted pawl engageable with said teeth, and an abutment surface on the frame member arranged to be engaged by the pawl for relieving the pawl pivot of the weight supported by the lifting member.

10. A jack including a frame, a recipr0-- catory lifting member mounted in the frame and provided with a series of teeth, an actuator for the lifting member, a pawl pivotally mounted in the frame and engageable with said teeth, and an abutment surpawl pivot of the face provided on the frame and arranged to be engaged by the pawl for relieving the weight supported by the lifting member.

11. A device of the character described comprising a lifting member movable longitudinally in direct engagement with the article to be lifted; a shaft having a fixed axis which is in line with said lifting member; an oscillatory member fixed to said shaft and having a periphery to directly engage the end of said lifting member, said periphery continuously increasing in its distance from the axis of the oscillatory member throughout the lifting movement, and,

extending angularly through more than 180 with reference to said axis, the oscillatory member having another peripheral part provided with a plurality of peripheral engaging portions; and a removable handle adapted for engagement with any one of said portions to operate the oscillatory member.

, JOHN C. JONES. 

